Yikes. (Post must be at least 10 characters.)
If nothing is available, the cartoons are grey. Also the images change relative to how many items are available.
If there are reviews/lessons available, it changes to pink or blue, respectively. Also the cute cartoons change, as mentioned by tip.
They don’t change on mobile the available now and time did change on mobile
I miss this too. It seems like the review button is supposed to automatically refresh, and I think I’ve seen it do it once or twice, but other times it’ll be ~30 mins past the hour and I’ll have to refresh the page to actually see the review button light up.
I understand that the panel on the right that gives the detailed info would also tell me if I need to refresh if I check the timeline and see what the time at the top is+if it’s in the past, but at a glance it’s not as user-friendly as it was when it used to just say “Available Now” in big letters to let me know I had to refresh / click the review button.